Machine for beveling soles



Jan. 18, 1949. E. J, RAY 2,459,339

MACHINE FOR BEVELING SOLES Filed Feb. 10, 1947 2 Sheets-Sheet l [nuentar Eugene J Ray y ey Jan. 18, 1949. E. J. RAY

MACHINE FOR BEVELING SOLES .2 Sheets-Sheet 2 Filed Feb. 10, 1947 x Mm; v 5 A z 1 3 7 H\ p a m w Help/L M U 1 2 5 6 A o o M y F a m Hey Patented Jan. 18, 1949 MACHINE FQR BEVELING SOLES Eugene 3. Ray, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application February 10, 1947, Serial No. 727,703

3 Claims.

This invention relates to rotary cutterheads and machines equipped with them. It is concerned specifically with a problem involved in beveling unattached shoe soles.

For example, an outsole intended to be attached with cement to a womans shoe is usually prepared as follows: after it has been cut approximately to the desired final outline the marginal bands of its attaching face are shaved in the shank portion to make them thinner than the marginal band in the forepart; and thereafter the marginal bands in both the shank and the forepart are coated with sole-attaching cement which is permitted to harden prior to attaching the sole. After the sole has been attached to a shoe it must undergo a final edge-trimming operation, edge-inking or staining, and edge-setting, but satisfactory results in these operations cannot be obtained if the marginal extension of the sole is coated with cement.

To remove a narrow outer band of the rela tively wide band of hardened cement prior to assembling the sole with a shoe, the present invention provides a beveling machine in which a rotary cutter-head is telescopically related to an upright driving shaft and adapted to float independently thereof. The cutter-head includes two collars, one of which is arranged to ride on the upper face of the margin of a sole and thereby float the cutter, and the other arranged to run on the perimeter of the sole and thus serve as an edge-gage. The freedom of the cutterhead to float without being loaded with the weight and inertia of the shaft, a pulley and a driving belt insures a bevel of the same width in the forepart of a sole as in the shank, despite greater thickness of the forepart.

Referring to the drawings,

Fig. 1 is a top plan view of a portion of a machine embodying the invention;

Fig. 2 is a vertical section through the cutterhead assembled with a shaft of one well-known yp Fig. 3 is a cross-section indicated by line III-III in Fig 2;

Fig. 4 is a vertical section of the cutter-head assembled with a shaft of another type;

Fig. 5 is an elevation of the cutter; and

Fig. 6 is an elevation of the adapter included in Fig. l.

The cutter comprises a cylindrical hub l9 and a circular series of cutting teeth It projecting from the periphery thereof, the tips of the teeth being beveled to provide inclined cutting edges l2. The hub extends above and below the teeth H, the portion above the teeth providing anchorage for a collar l3, and the portion below them providing anchorage for a collar 14. Two diametrically opposite segments l5 of one end of the hub are formed by cutting away two other segments, the segments l5 constituting clutch elements by which the cutter may be driven.

The collar I3 is fastened to the hub til by a set-screw l5, its lower face lying on the teeth H and projecting radially beyond them to ride on the upper face of the margin of a sole H and thereby float or support the cutter in the desired relation to the sole. This collar is provided with small holes i8, one for each tooth H, through which dust and small chips of sole stock may escape from the teeth.

The collar It is fastened to the hub by a setscrew l9. Its circular periphery is arranged to guide the perimeter of the sole.

Fig. 2 illustrates one well-known type of cutter shaft 20 having an integral cylindrical end portion 2! of a size to fit the bore of the hub of the cutter and to be telescopically related thereto. A larger portion of the shaft, adjoining the inner end of the portion 2!, is provided with two diametrically opposite grooves to receive the segments 1 5 of the hub l 0 (Fig. 3) and to form driving segments 22 with which the segments [5 may be interengaged.

Fig. 4 illustrates another type of cutter shaft which comprises a body section 20' and a nonexpansible sleeve section 21. These are tightly connected by a screw 23 and a retaining washer 24 which abuts the outer end of the sleeve section and projects radially therefrom to provide a shoulder. The body section has a conical por tion 25' primarily intended to carry an expansible sleeve and a cutter or other tool, but which, for purposes of the present invention, is nested in the non-expansible sleeve section 2| and engages its interior surface to maintain it in coaxial relation to the body section. The sleeve section 2! fits the bore of the cutter and is utilized as an adapter to which the cutter may be telescopically related with the same effect as it would have if mounted as shown in Fig. 2. The inner end of the sleeve section is provided with driving segments 22 (Fig. 6) arranged to be interengaged with the segments l5 of the cutter.

Fig. 1 represents a top plan view of a portion of a machine comprising a horizontal work-supporting table 30, a power-driven feed-wheel 3i and a power-driven shaft and cutter assemblage arranged to rotate about an upright axis. The cutter shaft may be either type shown in Figs. 2

1 3 and 4. The table 36 is fixed to remain at a constant level, but the feed-wheel 3|, which runs on the upper face of a sole [7, is movable up and down according to variations in the thicknesss of the sole. The feed-wheel is afiixed to a driven shaft 32, and the latter is journaled in a yieldable bearing member 33 that is spring-biased downwardly to; maintain pressure of'the wheel upon the sole. The periphery of the feed-wheel comprises teeth having sharp outcurved edges for engaging the work.

The feed-wheel is driven in a direction to feed a sole toward the cutter assemblage which is initially supported by the driving segments 2-2 (or 22', as the case may be) of the cutter shaft. The

latter is supported at a constant level by its bearings (Fig. 4) in a frame 34, and is driven in the direction indicated by an arrow in Fig. l.

The table 38 is set at a level that will enable the cutting edges I2 to bevel the margin of a sole at its thinnest points, usually in the shank. In Fig, 1 the lines 35 represent the inner boundaries of areas that have been reduced to less thickness than the margin of the forepart. The line 3?? represents the inner boundary of a narrow marginal band that has been beveled by the edges t2.

When a beveling operation is begun by sliding a margin of the heel seat of a sole under the feedwheel 3!, the latter feeds the sole under the eel-- lar l3, under the inclined cutting edges :2, and against a fixed guide 3? and the collar it. No manual control of the sole is necessary ordesirable after the feed-wheel has once taken hold of it. Although the primary component of feed ing force derived from the feed-wheel is from left to right, the cutting edges l2, and, to a lesser extent, the collars l3 and i4, furnish a secondary component in a direction oblique with respect to that of the primarycomponent. The feed wheel, the fixed guide 37 and the collar it are sorelated as to maintain the sole in a true relation to the cutter throughout a beveling operation and to turn the sole end for end as the operation progresses around the toe end thereof.

As the beveling progresses from a margin of the shank to a thicker margin of the forepart, the cutter-head will slide up relatively to its shaft, and when the beveling passes from the forepart to the thinner margin of the shank thecutterhead will slide down accordingly, and thereby maintain uniform width of the beveled band. These sliding movements of the cutter-head are governed by the rim of the collar l3 which projects outside the orbit of the teeth Hand rides on the upper surface of the work. I

The weight of the cutter-head would, in some I. In a machine for beveling unattached soles,

a work-supporting table, a rotating supporting means arranged to rotate about an upright axis, a cutter surrounding said rotating supporting means in telescopic relation thereto and arranged to-slide up and down with respect thereto, the cutter having peripheral cutting teeth above the plane of the table and a hub extending above and below'said teeth, a collar affixed to said hub above said teeth and extending radially beyond them to ride on the upper face of. a sole and thereby support the cutter, and another collar carried by said hub below said teeth to guide the perimeter of the sole, said rotating supporting means and said hub having interengaged. elements arranged to drive the cutter and permit it to slide up and down in circumstances, be suificient to maintain the collar I3 in contact with thework, but when the cutter is to be used to remove a narrow band of hardened sole-attaching cementfrom the upper surface of a leather sole it is preferable toprovide a compression spring'ZlS to bias the cutter-head toward the inner end, of the cylindrical portion 2 i, or the sleeve section 2 l", as the case may be. r the assemblage shown in Fig. 2 the spring surrounds the portion 2i between the hub Hi and the projecting rim of a retaining washer as which is fastened to the end of the shaft by a screw 23. In the other assemblage (Fig. 4) the spring surrounds the sleeve section 2 l between the hub In t response to variations in thethickness .of the margin of the sole.

2'. A rotary cutterassembl age comprising a shaft having a cylindrical end portion, a cutter having a hub and peripheral cutting teeth, said hub surrounding said cylindrical end portion in telescopic relation thereto, a retaining member detachably fastened to the shaft beyond the outer end of the cutter, anda compression spring surrounding the shaft between said retaining member'and the cutter to bias the latter inwardly from the retaining member, the shaft and the inner end of said hub having interengagedsegments for driving the cutter.

3. A rotary cutter assemblage comprisingshaft including a body section and a detachable sleeve section, the sleeve section having a cyli-n drical periphery and the body sectionhaving a portion nested in the sleeve section and engaging the interior surface thereof to maintain. ccncentric relation of the sections, means detachably connected to the body section for fastening thev sleeve sectiontightly thereto, said means including a retaining member abutting the outer end of the sleeve section and projecting radially therefrom to provide a shoulder, a cutter surrounding said sleeve section in telescopic relation thereto, said cutter having a hub andperipheral cutting teeth, and a compression spring surrounding the sleeve section betweensaid shoulder and the cutter to bias the latter toward the inner end of the sleeve section, said hub and the sleeve section having intereng'aged segments arranged to drive the cutter and permit end-wise movement thereof.

' EUGENE J. RAY.

REFERENCES CITED The following references are of record in the file of this patent: I e 

